Computer viruses are man-made software programs that can copy themselves and spread by attaching to other applications and files. They can be dangerous as they can quickly infect computer programs. Malware is any malicious software installed without permission that performs unwanted tasks, often for third party benefit. Common types of malware include viruses, spyware, adware, and browser hijacking software. Trojans are a type of malware that enable hackers to gain access to systems in order to spy on private information or delete, block, modify, or copy data.

2. COMPUTER VIRUS
A computer virus is a software programmed with an ability to make
copies of itself, which attacks itself to other applications or files.
 All computer viruses are man-made.
 Simply virus is more dangerous because it will quickly affected in computer
programs.
 For example : you could receive email with a malicious attachment, open the file
unknowingly and then the computer virus runs on your computer

3. TYPE OF COMPUTER VIRUS
VIRUS
BASIC
VIRUS
EMAIL
VIRUS
TROJAN WORMS

4. MALWARE
 The word malware come from the combination of malicious and software
 Malware = malicious + software
 It is a malicious software that gets installed in your device and performs
unwanted tasks, often for some third parties benefits.
 Sophos can be installed on Windows, Linux and MAC computers for protecting
all computers from unwanted attacks.

5. TYPES OF MALWARES
 VIRUS
 SPYWARE
 ADWARE
 BROWSER HIJACKING SOFTWARE

6.  VIRUS
Software that replicate itself and spreads by damaging and deleting the file.
Virus enters your device via attached images, greetings, audio –video files,
downloads etc.
 SPYWARE
It is a programme that gets installed without the users permission.
 ADWARE
Software that is financially supported by displaying ads when you are connected
to the internet.
It is used by the company for marketing purposes.
 BROWSER HIJACKING SOFTWARE
Software that modifies your browser settings, create desktop shortcuts and
display intermittent advertising pop ups. Once a browser is hijacked the software
may also redirect links to other sites that advertise or sites that advertise or sites
that collect web usage information's.

7. SPYWARE
Spyware is one type of malicious software (Malware) that collect information's
from a computing system without content.
Spyware can capture keystrokes, Screenshots, data from web, Internet usage
,habits and other personal information's.

8. ANTI SPYWARE PROTECTION
 Use Norton Internet Security to provide anti – spyware protection and
proactively protect from other security risks.
 Configure the firewall in Norton Internet Security to block unsolicited
requests for outbound communication.
 Do not accept or open suspicious error dialogs from within the browser.
 Spyware may come as part of a “ free deal” offer – do not accept free deals.

9. TROJAN
 It is a type of malware.
 It can be employed by cyber thieves and hackers trying to gain access to
user’s systems.
 Trojan can enable to spy of your private matter.
 These actions can include
1. Deleting data
2. Blocking data
3. Modifying data
4. Copying data